基于三频点声速测量的气体压强合成算法  

Synthesizing Gas Pressure Based on Acoustic Relaxation Frequency of Sound Speed Dispersion Measured at Three-frequency Point

作　　者：张向群[1] 杜根远[1] 刘婷婷 ZHANG Xiangqun;DU Genyuan;LIU Tingting(School of Information Engineering,Xuchang University,Xuchang,Henan 461000,China;School of Physics&Electronics Information,Hubei University of Education,Wuhan,Hubei 430205,China)

机构地区：[1]许昌学院信息工程学院,河南许昌461000 [2]湖北第二师范学院物理与电子信息学院,湖北武汉430205

出　　处：《计算物理》2022年第4期411-417,共7页Chinese Journal of Computational Physics

基　　金：国家自然科学基金(62071189,61901164);河南省科技厅科技攻关项目(212102310906);许昌学院省级创新团队培育项目(2022CXTD004);贵州省科学技术基金项目(黔科合基础-ZK[2021]一般318)资助

摘　　要：利用声速测量精度高,测量方法简单的特点,提出一种基于三个频率点测量声速合成气体压强的算法。首先在三个频率点测量声速,然后计算得到声速频散谱拐点的弛豫频率,最后根据弛豫频率与压强成线性正比的关系得到气体压强,仿真结果验证了该算法的可行性。为在线实时检测气体腔体压强提供了一种技术简单、精度高的超声方法。We present a method of synthesizing gas pressure based on acoustic velocity at three-frequency point with high accuracy and simple measurement.Firstly,acoustic velocity at three frequency points is measured.Then,relaxation frequency of acoustic velocity dispersion is calculated.Finally,gas pressure is obtained according to the linear proportional relation between relaxational frequency and gas pressure.Simulation results verify feasibility of the algorithm.The method is simple and of high precision for ultrasonic online real-time pressure detection of gas chambers.

关 键 词：声学测量 声弛豫频率 气体压强 超声检测 

分 类 号：O422.1[理学—声学]